spring weight................
 

how do you measure spring weight....i have some springs i'm using in a droop set up i think that are to soft....i need them to left the rig a bit to 2 1/2" GC....
there from a box of springs i had bout 20 years from a nut/bolt kit....instead of buying a bunch of springs to fit inside my losi shocks i won't need....i need to measure these springs but don't know how to...........bob

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I'm curious about this too. I hope somebody out there knows the answer."thumbsup"

the number on the spring denotes how much weight it takes to compress the spring 1 inch. so if you have a 1.8 spring it would take 1.8 pounds to compress it 1 inch. hope that helps man.:) or do these not have any packaging that you can look at?

Spring Rate EQ I use...


Rate=

11500000*wire_dia^4
-----------------------------------
8*number_active_coils*mean_dia^3


You will need some calipers. Also. if they are powder coated its going to throw off your numbers a bit.

no package with these springs, there from a nut/bolt kit that came in a plastic rack with 20 draws full of all kinds of stuff for bout 10.00 back then :lol: ....i have an electric digi scale i can try to get a weight reading on....i'll post pic's tommorrow on my findings................bob

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Take a known weight, place it on the spring. Measure the deflection. Spring rate = weight/deflection.

can't i just read the screen on my digi scale as i'm pushing it down on my digi scale to a travel of 1" :idea: ...............bob

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Same difference. Actually on the race car what we do is we place a scale on the vertical mill, then the spring. We take the head ( drill chuck, whatever) and compress the spring 1 inch. The reading on the scale is the spring rate (in units of what the scale is measuring (ounces, pounds, etc...) divided by inches). Remember the units on a spring rate are a force (pounds, kilograms) divided by length (inch, meter). So when you say a spring rate, tell what units they are in. For example, my full size car has a spring rate of 7 kg/mm. but if I told you 7 and no units, that would be meaningless information.

i just measured the spring at 1.25" length stood it on my scale, zero'ed it out then pressed it down an inch....i got just under 15.86 +/- ounces in the readings of the only two i had from the kit....at least i know to start at 1.5 lb and go up...............bob

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